Re: hdd + ssd

krautus
2015-10-24T05:39:08Z

Thank you all for the suggestions!
I'll report back my progress, will take a while .. :)

Bye and have a nice week-end,
Mike

On Fri, 23 Oct 2015 23:34:00 +0200
Stefan Ring <stefanrin@gmail.com> wrote:

> On Fri, Oct 23, 2015 at 1:48 PM, Emmanuel Florac <eflorac@intellique.com> wrote:
> > YMMV, but here's my take:
> >
> > * flashcache being a facebook internal dev, probably is the most
> > largely deployed one. It's clearly production-ready.
> >
> > * EnhanceIO works fine but I haven't tested it thoroughly. It adds no
> > signature to the drives so it can be added to existing filesystems
> > (flashcache and bcache need reformatting). However that means that
> > bad thing may happen if you're careless -- it's clearly targeted at
> > always-on servers.
> >
> > * bcache works fine but the latest fixes haven't been backported, so
> > you should probably use it only with latest (4.2, 4.3) kernels. It's
> > not very mature yet but it's *friggin' fast*.
> >
> > * dm-cache is the easiest to set-up with the lvmcache command (if your
> > distro is recent enough of course). Like very very easy. It's
> > unfortunately the slowest of the pack, apparently. Doesn't need
> > reformatting IF your existing FS already lives in a LV.
>
> Very good summary, thanks! Do you also happen to know if all of these
> retain cache contents across reboots?